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Electric fuel pump

Electric fuel pump Solenoid Contacts Rod Return spring Exit valve Inlet valve Chamber Diaphragm

An electric pump has a similar diaphragm mechanism; it is worked by a rod that is drawn into a solenoid switch until it opens a set of contacts to turn off the current.

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    How a fuel pump works

    A car engine burns a mixture of petrol and air. Petrol is pumped along a pipe from the tank and mixed with air in the carburettor, from which the engine sucks in the mixture. Read more